Hi @burisch
My apologies for delayed reply.
Your backup process looks fine for me, it should be successful.
Please confirm that by checking your backup(s) list inside our plugin settings.
This list can display only valid and restorable backups.
If your most recent backup is listed there, then all is fine, you don’t have to worry about anything and error windows was most likely a false positive.
Let me know if the backup is there ??
Thank you!